If the file is already downloaded, upload it to VirusTotal to check it against over 70 different antivirus scanners simultaneously.
In rare cases, this could be a batch of curated creative assets (like "836 best Photoshop brushes" or "836 best fonts") from a legitimate marketplace. However, without a verified source, you should treat it as a threat.
Typically arrives as an unsolicited email attachment or a link in a message that creates a false sense of urgency or curiosity [3]. Immediate Recommendations